High zinc chloride content: can improve cathode current density and cathode current efficiency
Oct 24, 2023
Zinc chloride provides zinc ions. When the content of ZnCl12 is set to the upper limit, the cathode current density can be improved and the deposition rate of the coating can be improved, but the dispersion ability and covering ability become worse. When the content of ZnCl12 is set to the lower limit, the dispersion ability can be improved, the loss of the plating parts taking out liquid and the cost of tank fitting and wastewater treatment can be reduced. When the content of ZnCl12 is too low, the concentration polarization will be large, resulting in low current opening, which will narrow the bright area of the plating, decrease the cathode current density accordingly, slow down the deposition rate, and prone to charring phenomenon in the high current density area of the plating.
High zinc chloride content: can improve cathode current density and cathode current efficiency
Reduce dispersion and coverage
High content makes the coating rough easily
Low zinc chloride content: can appropriately improve the dispersion ability
When it is too low, the concentration polarization will increase, the current will not open much, the upper limit of the current density will decrease, the high current density area will appear charring phenomenon, and the bright area will narrow.
